Any premium motorcycle 20W50 will be fine. By its very nature any multi-viscosity oil is a synthetic blend. I use Torco brand oils, but any name brand would be fine. Use Spectro,. Motul, or any other name brand from your motorcycle store. Remember, with the Unit construction engine it is important to get a motorcycle lubricant with additives for the clutch and transmission. Anything wet and slimey will work, but "safe for motorcycles" is not nearly as good as motorcycle specific.

Wear, abuse, or mis-adjustment cause clutch slippage. The oil makes no difference. Full synthetics are great, but one of the properties of a full synthetic is its ability to flow in extremely tight tolerances. This means that if there is any flaw in a casting or gasket it is more likely to leak. SJ and later oils are formulated for modern car engines, These run tight tolerances and high oil pressure. These oils have less heavy metals to better meet EPA requirements in new cars. This is the opposite of the RE. The SH and earlier spec oils use a different additive package that makes them more friendly to older engines and other engines similar to the RE. The JASO-MA spec was certified by the Japanese oil industry to meet the need of the older bikes when the SJ spec was introduced in the US.

Because I am getting near to an oil change, the manual does state as above but also 15W 50 API SL GradeJASOMA ESTER Semi Synthetic oil.Now my question is, is this a grade of semi synthetic or is there a choice of an ordinary oil or semi syntheticI.E. 15w 50api sl grade or Jasoma Ester semi synthetic.I need to be sure in case the dealer slips in an ordinary oil, when it should in fact be a semi synthetic.( when originally asked he said, Oh! I just put in "so and so" but it did'nt sound like a semi synthetic to me, and he may have been thinking that the oil that went into older previous models would do,Cheers

One thing to be careful about is to not use auto oils that contain friction modifiers in wet clutches. These oils generally have a disclaimer on them that specifies they are NOT suitable for wet clutch uses. Make sure you get something that is a motorcycle oil.

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Dave

"The reason most people don't recognize opportunity when it knocks, is because opportunity almost wears work clothes."

One thing to be careful about is to not use auto oils that contain friction modifiers in wet clutches. These oils generally have a disclaimer on them that specifies they are NOT suitable for wet clutch uses. Make sure you get something that is a motorcycle oil.

I used Mobil One 20W 50 full synthetic when I did my first oil change. When I picked up my bike after the recall work, Aaron at Interstate Motorcycles said what he put in and recommended was Amsoil 0w 40 for motors with hydraulic lifters.

I used Mobil One 20W 50 full synthetic when I did my first oil change. When I picked up my bike after the recall work, Aaron at Interstate Motorcycles said what he put in and recommended was Amsoil 0w 40 for motors with hydraulic lifters.

Aaron did my service last week and put in Amisol 0-40 in mine too, I'll use what they reccomend, sure looks thin though. These UCE engines are a brave new world for me.

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